Regular shoppers at these stores may already know what to buy and what to pass on, while new customers may be more compelled to go on a shopping spree.

If you’re not utilizing the 40% discount that all three stores regularly issue out, your shopping cart total can quickly add up with more impulse purchases than necessities.

We spoke with former employees from the three stores, along with die-hard customers, fashion bloggers, and retail analysts, for their take on what to buy and skip on at Banana Republic, Old Navy, and Gap.

Buy at Banana Republic: Madison 12-hour pump

Image and branding consultant Sheila A. Anderson said she thinks women’s shoes at Banana Republic should be in the spotlight more often. This is especially true of the Madison 12-Hour Pump, which lives up to its name.

“This classic pump comes in a range of colors and are so comfortable you can wear them for 12 hours a day or more,” Anderson said.

Skip at Banana Republic: Jewelry

Banana Republic’s sparkly necklaces and bracelets might be better left on the store’s shelf. Lifestyle blogger Catherine O’Connell, who previously worked at Neiman Marcus and Saks Fifth Avenue, said that some pieces of Banana Republic jewelry may be poorly constructed and unable to last from one season to the next.

“Take a close look at the jewelry before purchasing, as their return policy is very strict,” O’Connell told Business Insider.

Still dreaming of pretty baubles? O’Connell suggests making the purchase when it goes on sale.

Collections like The Tokyo Collection still exist at Banana Republic for men and women. However, Heritage seems to only be available for men only. O’Connell says Heritage is usually omitted from the sales rack, too.

“The prices can be higher than what you can find for similar styles at other retail or online vendors,” O’Connell said.

Buy at Banana Republic: Standard-fit non-iron shirt

In 2015, GQ magazine profiled the efforts by Banana Republic and its designers working to redesign and tailor menswear at the retailer. Several former employees of the company praised the Banana Republic menswear line in interviews with Business Insider, and spoke highly of its elevated style and great-quality materials used in pieces from suits to shirts.

For men starting, or Marie Kondo-ing, their work wardrobe, add Banana Republic’s standard-fit non-iron shirt to your shopping cart. These button-up shirts are a wardrobe staple that won’t break your budget. Shoppers of all ages can easily take this look to a corporate meeting or to dress down after work.

Skip at Banana Republic: Belts

Belts for men at Banana Republic are priced up to $59.50 for a single belt. Chris Navalta is a longtime shopper at the store and loves the store so much that he even worked there for discounts. However, he said he draws the line when it comes to its belts, as they tend to be overpriced.

Buy at Banana Republic: Luxury-touch polo

A menswear classic never goes out of style. Dave Bowden, founder of menswear fashion blog Irreverent Gent, told Business Insider that Banana Republic’s luxury touch polo shirts are a must-have for stylish guys.

What sets these shirts apart from regular polos? It’s all in the material.

“While nearly every other menswear store offers some version of a basic polo, this polo is made of luxury-touch cotton. It’s both softer and more stylish than the vast majority of cotton-poly blend polos on the market,” Bowden said.

Buy at Old Navy: High-rise elevate compression leggings

Public relations account supervisor Rachel Cooper swears her “undying love” for Old Navy women’s high-rise elevate compression leggings. At under $30 a pair, these leggings come in a wide variety of fun patterns and are frequently on sale, making them even more affordable than other competing legging retailers like lululemon.

Compression leggings are great for all sorts of athletic activities including yoga and running.

“They last forever and fit like a glove,” Cooper said.

Buy at Old Navy: Sports bras

Lucy Silag, who works in publishing in New York City, is a die-hard Old Navy shopper. When Silag joined a half-marathon training group in 2014, she went on a $200 Old Navy shopping spree to outfit herself for five runs each week. Silag picked up compression leggings, tank tops, and sports bras.

Old Navy’s sports bras emphasize finding your fit. Their three bra types include light, medium, and high, suitable for a range of activities including Pilates, spin class, and running.

Five years later, Silag said she still has, and wears, all of these pieces including her sports bra and has found each holds up remarkably well for the price point.

Skip at Old Navy: Jewelry

Business Insider/Mary Hanbury

In addition to working at Banana Republic for three years, Magnanelli has been an Old Navy shopper for more than 10 years. Jewelry purchases, she says, are largely impulse buys.

“It’s more likely you’ll buy it, put it away, and then throw it out a few months later,” Magnanelli told Business Insider.

Buy at Old Navy: Maxi dresses

This summer, Magnanelli recommends saying yes to Old Navy maxi dresses. Available in plus-size and regular fits, women’s maxi dresses are all currently under $50 at Old Navy and perfect for running around with the kids or dressing up for a night out.

Buy at Old Navy: Workout apparel

Business Insider/Mary Hanbury

Don’t miss out on men’s activewear from Old Navy. Bowden advises getting T-shirts and shorts here instead of Gap because they cost 40% less. His one complaint is that the colors and patterns come in mostly basic blues, blacks, and grays. However, Bowden says with workout clothes, it’s less about looking fashion-forward and more about getting the job done.

Buy at Old Navy: Pajamas

As a high school student, Liz Jeneault was a retail employee at Old Navy for two years. Then and now, she said customers loved to buyOld Navy’s pajamas.

When’s the best time to snag PJs? Jeneault says to shop during the holiday season for extra discounts. Sometimes Old Navy will even offer matching pajamas for the whole family during the holidays, making the purchase a good present.

Skip at Old Navy: Blouses

“I feel like they’re better at the basics than fancier items,” Jeneault told Business Insider.

Buy at Old Navy: Straight leg jeans

Business Insider/Mary Hanbury

Regardless of what gender you’re shopping for, the denim selectionat Old Navy can’t be beat when it comes to price and fit. Denim sizes go up to size 20 in women and size 30 for plus-size in a wide variety of washes.

“Almost any other jeans I try on fall at my shins or can’t get over my hips. These jeans work with my body type because they offer curvy and tall options,” Shaner said.

If you’re looking to reel in even more deals, Shaner recommends swinging by Old Navy’s clearance rack. A quick browse could land you seriously great sales since the items there have been returned and are heavily discounted. Shaner said she snagged a pair of jeans from clearance once that were $0.97.

“These tops, and styles, are available in petite sizes,” Brophy said. “As someone who is 5-foot, this is super important for me as a shopper.”

Buy at Old Navy: Socks

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As a basic accessory staple, Old Navy’s socks are available for all genders and come in a wide variety of styles and colors. They’re also made of cotton, ensuring they’ll hold up well after the purchase.

Skip at Old Navy: Suits for women

Business Insider/Jessica Tyler

Planning to pick up your next job interview ensemble at Old Navy? You’re better off heading to Banana Republic instead, said personal stylist Neepa Sikdar.

As a former merchandising buyer with 13 years of retail experience, Sikar says that most of the work clothes at Old Navy are made with flimsy material. She also told Business Insider that the fit for suits tends to be off.

Buy at Old Navy: Jumpsuits

“This jumpsuit takes you from morning errands to an afternoon work meeting to a night out with friends all in one day,” Anderson said, “Its fit is flattering to all shapes and sizes. It’s also made of super-soft rayon jersey fabric. This allows for better ease in movement while holding its shape.”

Skip at Old Navy: Anything made of polyester

Business Insider/Mary Hanbury

While we’re on the topic of fabric, personal stylist and fashion blogger Vanessa Valiente says to avoid buying clothes made out of polyester. This applies to apparel at Banana Republic, Old Navy, and Gap.

“The polyester garments that come out of these stores looks very cheap,” Valiente told Business Insider. “When in doubt, check the tag and walk away.”

Buy at Old Navy: Functional drawstring poplin shorts

Routinely on sale but priced for no more than $13 a pair, the poplin shorts are winners with Carey. This is thanks to the material’s quality and fit, the latter of which is no easy feat when you have a growing kiddo on your hands.

“These have been through so many washes, and the quality always holds up. They always seem to fit my son perfectly,” Carey told Business Insider.

Buy at Gap: Fitted Oxford shirt

The women’s fitted Oxford shirt is a go-to purchase for avid Gap shopper Kristine Thorndyke. Generally retailing at nearly $50, the button-down top occasionally goes on sale. However, it’s the quality and fit that makes the blouse worth spending extra bucks.

“I have a blue button-down that still looks amazing after six years of wear,” Thorndyke said.

Thorndyke’s love for Gap’s fitted Oxford shirt makes it her one splurge outside of online retailers and storefronts like TJ Maxx.

“These cotton shirts have high-quality stitching and can easily be dressed up or down,” Thorndyke told Business Insider. “I have worn this shirt in a casual interview and during the day while sightseeing on vacation.”

Buy at Gap: Mid-rise classic straight jeans

Did you know Gap started because founders Donald and Doris F. Fisher could not find jeans that fit either of them? Fifty years later, Gap is still one of the best places to buy jeans.

Available in regular and petite sizes, Gap’s women’s mid rise classic straight jeans are made from premium stretch denim that customer reviews describe as great fit, comfortable, and even cool. What’s cooler is that they’re also made with Gap’s Washwell program, a water-saving wash method that has saved millions of liters of water since 2016.

Retailers like Madewell, Howell said, also offer premium denim products, but at nearly double Gap’s price tag. H&M and Forever 21 also have competitively priced denim products, but the jeans are made of lower-quality fabric.

“The price and quality of Gap’s jeans are what set them apart from others in the same category,” Howell said.

Buy at Gap: Straight jeans with GapFlex

Vinnie from New York says it all in his Gap review: “These are hands down the best jeans I’ve ever put on. They fit perfectly, look amazing, and the stretch is awesome. I may never take them off again.”

It’s a five-star review so good, Gap added it into the product details for its men’s straight jeans with GapFlex— Gap’s stretch technology. If it utilizes GapFlex, the garment will be extra flexible and comfortable to move with your body.

Buy at Gap: Jeggings

Jeggings are “jean leggings,” in case you didn’t already know. Valiente said Gap’s jeggings for women have a special place in her heart as one of her favorite purchases. Made with distressed details, it’s also hard to differentiate the jeggings from jeans.

“If you cannot afford higher-end denim, this is seriously what I recommend instead,” Valiente told Business Insider.

Skip at Gap: T-shirts

Mallory Schlossberg/Business Insider

Gap has a wide variety of tees for shoppers to choose from, but there’s no need for adults to go on a somewhat-pricey T-shirt shopping spree. Howell said she often finds that her Gap T-shirts have been stretched out and disfigured after just a few wears and washes.

Why the extra cost? Bowden told Business Insider it’s because the store’s parent company prefers to position Banana Republic as the “premium brand” over Gap.

Buy at Gap: Anything from Gap Kids

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Kids are dressing cuter and cooler every day with the apparel at Gap Kids, from lace-up booties to dinosaur briefs to slim jeans. Parents of budding fashion-forward tots can combine shirts with cute designs with leggings to quickly build a child’s wardrobe.

Magnanelli said that through her experience shopping at Gap Kids the apparel is consistently the best on the market in terms of price, quality, and adorableness.

Buy: Anything from Baby Gap

Business Insider/Mary Hanbury

While we’re talking kids clothing, don’t forget about Baby Gap for one-pieces and hoodies for babies. Here, parents really get a chance to tailor how they dress their newborns. Clothing options are available by age and by the pound.

Skip at Gap: Sweaters

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For adults, that is. There may be a plethora of new sweaters to choose each season, but they struggle to maintain their shelf life.

“These tend to shrink,” Sikdar said.

Buy at Gap: Chinos

With only four styles left on Gap’s website, women’s chinos are selling out fast this summer — and for good reason. Magnanelli says it’s thanks to the pants fitting exceptionally well across all body types that shoppers keep coming back every season.

Buy at all three stores: Things that are 40% off

Mallory Schlossberg/Business Insider

Banana Republic, Old Navy, and Gap each frequently rotate promotions for 40% off their clothing and accessories. These sales occur multiple times throughout the year, and often during the holiday season or over long three-day weekends. Sign up for their email newsletter mailing lists to stay in the loop and cash in on the deals.